Method of producing carbon-black



METHOD 0F= PRODUC|NG CARBON BLACK.

' B. W. RUMBARGER'I.

APPLICATION FILED OCT. 5, 1920.

Patented Dec. 27, 192 11 v avwmtoz 22mm M RU/VBARliL-z? of oxygen orair,

cares stares WARE.

a. LEY W. @UEKBARGER, OF FAIRBANKS, LOUISIANA, ASSIGNOR T SO'OTHERNCARBON COMEANY, OF FAIRBANKS, LOUISIANA,

A CORPORATION OF DELA- EIETEOD OF PRODUCING CARBON-BLACK.

Specification of Letters Patent.

Patented Dec. 27, 1921.

Application filed October 5, 1920. Serial No. 414,891.

prodilcing carbon black in whlch carbon 1s liberated by the imperfectcombustion and decomposition of a hydrocarbon compound, preferably insome fluid form, as for 1n- 16 stance hydrocarbon gas or vapor, thecarbon so liberated being deposited upon a suitable plate or surfacefrom which it is subsequently removed by'scraping or otherwise.

My invention will be particularly de scribed in connection with theprocess of producing carbonblack from the unburned and decomposedportion of a hydrocarbon gas or vapor fed through a suitable burnersuitably housed or inclosed, from which its application to theproduction of carbon black and other hydrocarbon fluids will be readilyunderstood.

It has been proposed to produce carbon blackby burning natural gashydrocarbon vapors or other allied or analogous products or substancesin an incomplete supply the burner or burners bein for that purposeusually located in a sultable housing or inclosure and being arranged sothat the flame will impinge upon a suitable plate or surface upon whichthe carbon black collects. In this operation the carbon collected is notthe direct result of the combustion of..-the hydrogen through 7 unionwith the oxygen supplied from the air or otherwise to maintain the flamebut is the direct result of the decomposition of the unburned portion ofthe hydrocarbon by the heat of the flame or burning portion of thematerial and will result primarily from the inner part of the flame orjet where the oxygensupply is low but where the heat is suflicient tobreak up the hydrocarbons present.

The aim of my present invention is to I so conduct the above operationof produclng carbon black that a more effective or extensivedecomposition and deposit of carbon black may invention conslstsessentially in protecting be secured to which end my the carbonproducing flame or jet by a gaseous screen or curtain preferablysurrounding the same and adapted to exclude or cut off the supply ofoxygen, said screen bein preferably a flame of any burning materiafl.For convenience a hydrocarbon may be supplied to maintain the saidprotective flame or screen.

By this means I secure a greater decomposition of the hydrocarbons owingto the lack of oxygen and the presence of heat from the protectingscreen.

My invention consists also in the construction of burner adaptedparticularly for carrying on the improved process as will be,

hereinafter more particularly described.

Figure 1 of the drawing shows in vertical section a typical form ofapparatus adapted for practicing my. invention. I

Fig. 2 is a plan of the burner and shows the relation of the carbonproducing and surrounding protective flames to one another. 1 is theplate or body upon which the carbon black is deposited. 2 is the body ofthe burner and 3 the hollow center to which the hydrocarbon in gaseousor liquid form may be supplied for egress through suitable burner tipsor jets. In the particular form of my invention shown there is a centraljet or jets 4 supplying the inner carbon producing flame and ing a flowby which a surrounding flame or flames may be produced to form a screenlimiting the access of oxygen to the central flame and also to furnishheat assisting in the decomposition of the hydrocarbon sup-- plied bythe inner jet. Obviously the burner may be of any desired size as may bedeemed convenient or desirable and any number of inner carbon producingjets maybe maintained as likewise any number of outer or protective jetsor flames.

Also as will be obvious the flames will be graduated or adjusted by thesize or number of the jet orifices or by any other de- 5 is a jet orjets furnish I sired expedient, to produce the effect described.

In addition each burner of the plant may have an outer protective wall 6adapted to prevent access of oxygen in undesirable or unnecessary amountto the burner. The building or inclosure in which the burners or burnersand the collecting plate are housed may be of any desired form orconstruction as well understood in the art.

What I claim as my invention is 1. The herein described improved methodof producing carbon black from a flame of hydrocarbon consisting inconducting the operation while said flame is surrounded by a protectivegaseous screen adapted to exclude oxygen.

2. The herein described improvement in producing carbon black from aflame of hydrocarbon consisting in burning hydrocarbon'behind asupplemental flame forming a protective gaseous screen adapted toexclude oxygen from the black producing flame.

3. The herein described improvement in producing carbon black from ahydrocarbon flame consisting in maintaining a protective flame forming agaseous screen exterior to and surrounding said flame and adapted tooms? A burner for carbon black having a jet or jets producing a flameformingfan oxygen excluding screen surrounding 'the carbon producing jetand an exterior protective wall.

Signed at Monroe, in the county of ()uachita and State of Louisiana,this 16th day of September, A. D. 1920.

BRADLEY W. RUMBARGER.

Witnesses:

C. H. MCHENRY, J. G. GRIFFIN.

